Rough skin is very much common during winter season. It is caused by low humidity. As you have noticed, the very cold air and the central heating systems around you can easily suck the natural moisture of your skin. The common negative effect of this is itchiness and a number of skin conditions. The people who experience this will witness how the fine lines of their skin look deeper. Some are not comfortable with their skin anymore. There is also a big tendency that the skin complexion is not on the best condition up to the extent that it looks uneven.